code: def test_apply_to_iterator_with_comm(self):
      comm = create_communicator("naive")
      self._check_apply_to_iterator(comm)
  
file_path: chainercv/tests/utils_tests/iterator_tests/test_apply_to_iterator.py
imports: import numpy
  from six.moves import zip_longest
  import unittest
  import chainer
  from chainer.iterators import SerialIterator
  from chainer import testing
  from chainermn import create_communicator
  from chainercv.utils import apply_to_iterator
  from chainercv.utils.testing import attr
label_desc: Use image node_id 4 for calling the TestApplyToIterator obj's underlying member method code with example usage: obj.test_apply_to_iterator_with_comm() without return types